Function _setVal

src/util/obj.js:174–215

(pieces, value, index, obj)

}

function _setVal(pieces, value, index, obj) {
  // iterate until one before the end (the last piece is the final key to set)
  var max = pieces.length - 1;
  while (index < max) {
    var piece = pieces[index++];
    if (typeof piece == 'function') {
      // filter an array based on a filter function, all matching array items
      // should be set to the proper value recursively
      return obj.filter(piece).forEach(bind(this, _setVal, pieces, value, index));
    }

    // if the next value is not defined or of the wrong type, set it to an
    // empty object or array
    var nextType = typeof pieces[0];
    if (nextType == 'number' || nextType == 'function') {
      if (!Array.isArray(obj[piece])) {
        obj[piece] = [];
      }
    } else {
      if (typeof obj[piece] != 'object' || obj[piece] == null) {
        obj[piece] = {};
      }
    }

    obj = obj[piece];
  }

  if (typeof pieces[max] == 'function') {
    // if the last part of the path is a filter, we need to conditionally set
    // the elements in the array
    var filter = pieces[max];
    var i = obj.length;
    while (i) {
      // iterate backward in case we're deleting elements
      if (filter(obj[--i])) {
        setValueForKey(obj, i, value);
      }
    }
  } else {
    setValueForKey(obj, pieces[max], value);
  }
};